FlightPathGeometry Class Reference

#include <FlightPathGeometry.h>

Inheritance diagram for FlightPathGeometry:

Collaboration diagram for FlightPathGeometry:

Signals
void	sceneChanged ()
void	anchorCoordinateChanged ()
void	pointCountChanged ()

Public Member Functions
	FlightPathGeometry (QQuick3DObject *parent=nullptr)
GeoScene *	scene () const
void	setScene (GeoScene *scene)
QGeoCoordinate	anchorCoordinate () const
int	pointCount () const
Q_INVOKABLE void	setPath (const QVariantList &coordinates, const QVariantList &highlights=QVariantList())
Q_INVOKABLE void	appendPoint (const QGeoCoordinate &coordinate)
Q_INVOKABLE void	updateLastPoint (const QGeoCoordinate &coordinate)
	Replace the last point (TrajectoryPoints emits this for colinear motion)
Q_INVOKABLE void	clearPath ()

Static Public Attributes
static constexpr int	kFloatsPerVertex = 8
	position 3, tangent 3, side flag, highlight flag

Detailed Description

Flight-path trail ribbon for the GeoMap 3D scene: a triangle strip along the vehicle's trajectory, depth-tested against terrain (hills hide it). Each trail point yields two centerline vertices carrying the path's unit 3D tangent (normal slot), a side flag (texcoord0.x, -1 left / +1 right) and a highlight flag (texcoord0.y, 0 or 1, for the fragment shader's highlight color); the ribbon has zero width until a vertex shader expands each vertex perpendicular to both the tangent and the view direction (billboarding), keeping the width constant in screen pixels for any segment orientation — including straight vertical climbs.

Positions are scene-unit offsets relative to anchorCoordinate (the first path point), so the buffer is immune to scene-origin re-anchors and to any constant altitude bias applied at the anchor. z offsets are pre-scaled by the scene's verticalScale but NOT terrainScale: parent the model under a node whose z-scale tracks GeoScene::terrainScale.

appendPoint/updateLastPoint update the vertex buffer incrementally (only the last two vertex pairs change); setPath and scene re-anchors rebuild it.

Definition at line 42 of file FlightPathGeometry.h.

Constructor & Destructor Documentation

FlightPathGeometry()

FlightPathGeometry::FlightPathGeometry ( QQuick3DObject *  parent = nullptr )

explicit

Definition at line 23 of file FlightPathGeometry.cc.

Member Function Documentation

anchorCoordinate()

QGeoCoordinate FlightPathGeometry::anchorCoordinate ( ) const

inline

First path point (invalid while the path is empty). Place the ribbon's node at this coordinate; altitude offsets in the buffer are relative to its altitude.

Definition at line 62 of file FlightPathGeometry.h.

anchorCoordinateChanged

void FlightPathGeometry::anchorCoordinateChanged ( )

signal

Referenced by appendPoint(), clearPath(), setPath(), and updateLastPoint().

appendPoint()

void FlightPathGeometry::appendPoint

(

const QGeoCoordinate &

coordinate

)

Definition at line 68 of file FlightPathGeometry.cc.

References anchorCoordinateChanged(), kFloatsPerVertex, and pointCountChanged().

clearPath()

void FlightPathGeometry::clearPath

(

)

Definition at line 125 of file FlightPathGeometry.cc.

References anchorCoordinateChanged(), and pointCountChanged().

pointCount()

int FlightPathGeometry::pointCount ( ) const

inline

Definition at line 64 of file FlightPathGeometry.h.

pointCountChanged

void FlightPathGeometry::pointCountChanged ( )

signal

Referenced by appendPoint(), clearPath(), and setPath().

scene()

GeoScene * FlightPathGeometry::scene ( ) const

inline

Definition at line 55 of file FlightPathGeometry.h.

Referenced by setScene().

sceneChanged

void FlightPathGeometry::sceneChanged ( )

signal

Referenced by setScene().

setPath()

void FlightPathGeometry::setPath	(	const QVariantList &	coordinates,
		const QVariantList &	highlights = QVariantList()
	)

Replace the whole path (QGeoCoordinate variants, TrajectoryPoints::list() format). highlights[i] (bool) highlights point i; missing entries are false. A segment between differently highlighted points blends along its length.

Definition at line 50 of file FlightPathGeometry.cc.

References anchorCoordinateChanged(), and pointCountChanged().

setScene()

void FlightPathGeometry::setScene

(

GeoScene *

scene

)

Definition at line 28 of file FlightPathGeometry.cc.

References scene(), sceneChanged(), and GeoScene::sceneOriginChanged().

updateLastPoint()

void FlightPathGeometry::updateLastPoint

(

const QGeoCoordinate &

coordinate

)

Replace the last point (TrajectoryPoints emits this for colinear motion)

Definition at line 97 of file FlightPathGeometry.cc.

References anchorCoordinateChanged(), and kFloatsPerVertex.

Member Data Documentation

kFloatsPerVertex

constexpr int FlightPathGeometry::kFloatsPerVertex = 8

staticconstexpr

position 3, tangent 3, side flag, highlight flag

Definition at line 53 of file FlightPathGeometry.h.

Referenced by appendPoint(), and updateLastPoint().

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The documentation for this class was generated from the following files:

• src/GeoMap/FlightPathGeometry.h
• src/GeoMap/FlightPathGeometry.cc